Inno setup: what are the parameters of function "regquerystringvalue"?

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Hello Guys,

I am a beginner at Inno Setup, I am trying to correct an existing code that is supposed to retrieve Matlab's Path using

RegQueryStringValue

My question is: how to know the parameters passed to this function, the SubKeyName the RootKey etc..? In other words, from the code below, where

SOFTWARE\MATLAB\9.

and

MATLABROOT

came from?

Your help is much appreciated.

What I have tried:

<pre>function Getmatlab(param: string): string;
var
  MatlabRoot: string;
begin
  log('start')
  if RegQueryStringValue(HKEY_LOCAL_MACHINE_64, 'SOFTWARE\MATLAB\9.5', 'MATLABROOT', MatlabRoot) then
  begin
    // Successfully read the value
    MsgBox('Your matlab root: ' + MatlabRoot, mbInformation, MB_OK);
  end  ;
   Result := MatlabRoot;
    
end;

Posted 3-Nov-19 21:37pm

Member 14643676

Updated 3-Nov-19 22:03pm

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Maciej Los · Accepted Answer · 2019-11-03T21:41:00

Solution 1

You can check this out yourself: Inno Setup Help[^]

You may be interested in RegGetSubkeyNames[^] too.

Posted 3-Nov-19 21:41pm

Maciej Los

Updated 3-Nov-19 21:43pm

v2

Comments

Member 14643676 4-Nov-19 4:31am

Thank you for your answer!
the function RegGetSubkeyNames is really intresting! well, I found out that Matlab is not in the list of subkeys!! So that's why an error occurs while installing my application. Do you have an idea on how to add a subkey?

Thank you so much

Maciej Los 4-Nov-19 4:34am

Sorry, but i haven't Matlab software. I'd suggest to read this: matlab - Find the path of an application, and copy a file to that directory in Inno Setup - Stack Overflow[^]

Member 14643676 4-Nov-19 5:02am

Thanks!

Maciej Los 4-Nov-19 5:51am

You're very welcome.

RickZeeland · Accepted Answer · 2019-11-03T22:04:00

Example:

MyRegKey := '{5560A93B-C797-6799-925F-98FCAD57BC36}_is1';

//  HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{5560A93B-C797-6799-925F-98FCAD57BC36}_is1
  if RegQueryStringValue(HKEY_LOCAL_MACHINE, 'SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\' + MyRegKey, 'InstallLocation', MyPath) then
// your code ...

You can search the registry with Regedit, see: How to Use Regedit (with Pictures) - wikiHow[^]
Be careful when changing things, first make a backup of the registry !